Mammillaria dixanthocentron
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Mammillaria dixanthocentron |
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| Backeb. ex Mottram |
Mammillaria dixanthocentron is a species of the genus Mammillaria in the cactus family(Cactaceae). The specific epithet dixanthocentron means '(Greek di) two, (Greek xanthos) yellow, (Greek kentron) center' often with two yellow central spines.
description
Mammillaria dixanthocentron , has a short, cylindrical body with a height of up to 30 centimeters (often only up to 20 centimeters) and a diameter of 8 centimeters. The axillae , which are initially covered with sparse wool, are located between the cylindrical warts . The areoles are also covered with delicate wool. The 19 to 20 radial spines are very thin, white and only about 2 to 4 millimeters long. The 2 to 4 central spines are sometimes whitish, yellow or brownish with darker to dark red tips. While the fresh central spines are initially only 5 millimeters long, those in the lower part can reach up to 15 millimeters.
The flowers are relatively small, around 15 millimeters in size, light red to purple with pink edges. The fruits are also cylindrical in shape, yellow in the lower part of the plant, orange in the upper part and about 15 millimeters long. The seeds are brown.
Distribution, systematics and endangerment
Mammillaria dixanthocentron occurs in the Mexican states of Oaxaca and Puebla at an altitude of 500 to 2000 meters. It was first described in 1980 by Roy Mottram . The synonym Mammillaria dixanthocentron var. Rubrispina R. Wolf (1987) described as a variety is known.
In the Red List of Threatened Species of the IUCN , the species is listed as " Least Concern (LC) ". H. listed as not endangered.
proof
literature
- Edward F. Anderson : The Great Cactus Lexicon . 2nd Edition. Eugen Ulmer KG, Stuttgart 2011, ISBN 978-3-8001-5964-2 , pp. 379 .
- Curt Backeberg : The cactus dictionary - Enumeratio diagnostica Cactacearum . Gustav-Fischer, Jena 1966, p. 606 .
- Salvador Arias Montes, Susana Gama López, Leonardo Ulises Guzmán Cruz: Cactaceae AL Juss . Universidad Nacional autonoma de Mexico, Mexico City 1997, ISBN 968-36-6011-8 , pp. 32 .
- John Pilbeam : Mammillaria The Cactus File Handbook . cactusfile.com, Southampton 1999, ISBN 0-9528302-8-0 , pp. 92 .
Individual evidence
- ↑ Urs Eggli, Leonard E. Newton: Etymological Dictionary of Succulent Plant Names . Birkhäuser 2004, ISBN 3-540-00489-0 , p. 68.
- ^ Roy Mottram: Mammillaria Index . 1980, p. 24.
- ↑ Mammillaria dixanthocentron in the IUCN Red List of Threatened Species 2013.2. Posted by: Arias, S., Valverde, T. & Zavala-Hurtado, A., 2009. Retrieved December 27, 2013.
